JP2001197124A - System and method for packet communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To commonly use a packet gate repeating processor (PGW) by a cellular packet system and a satellite packet system, by providing respective timer values while distinguishing a (cellular/satellite) communication system in the PGW. SOLUTION: In the packet communication system provided with a subscriber system processor 20 for cellular packet system, a subscriber system processor 21 for satellite packet system and a PGW 10 for connecting the respective subscriber system processors to another network 50, the PGW is provided with a judging means for judging whether the party of packet communication is the subscriber system processor 20 for cellular packet system or subscriber system processor 21 for satellite packet system and a setting means for setting a response wait timer value concerning a wireless block according to the judged result of the judging means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a packet communication system and a packet communication method.

[0002]

2. Description of the Related Art Conventionally, a cellular packet system for performing packet communication using mobile communication has been developed.

FIG. 1 is a diagram conceptually showing an example of a cellular packet system according to the prior art.

The packet communication system 100 includes at least a cellular packet gateway relay processor PGW10, a cellular packet subscriber system processor PPM20, a cellular base station 30, a cellular mobile station 40, and a network service provider NSP / intranet 50. Be composed. The cellular packet gateway relay processing device PGW10 is
An exchange having a gateway function for connecting the cellular packet network and the network service provider NSP / intranet 50. The cellular packet subscriber processing unit PPM20 is located between the cellular packet gateway relay processing unit PGW10 and the cellular base station 30, and has a function of performing packet switching. The cellular base station 30 has a function of transmitting and receiving a wireless packet to and from the cellular mobile station 40 located in the area.

[0005]

[0005] Here, N
A satellite bucket system that performs packet communication by performing satellite communication via a communication satellite such as STAR is also possible. However, the delay time of the wireless section differs between the cellular packet system and the satellite packet system. There are two factors that cause a difference in delay time. The first is the difference in delay time, and the second is the addition of channel assignment processing in satellites. The first factor is that communication satellites are usually located about 36,000 km above the ground,
The delay time of the radio wave increases accordingly. If the delay time due to the length of the radio section in the cellular packet system is ignored, the round trip time between the mobile station and the PPM is generally about 0.5 sec longer for the satellite. Another factor is a difference in a channel usage method in a wireless section.
In packet communication in satellite communication, in order to efficiently use the channel, a scheme is adopted in which the uplink channel is temporarily occupied and allocated when transmitting the uplink signal, and a round trip signal related to channel allocation is transmitted before transmitting the uplink signal. Is transmitted / received (see “Japanese Patent Application No. 10-174449”). Therefore, the round trip time between the mobile station and the PPM is generally about 0.5 sec longer for the satellite. Therefore, due to these two factors, the round trip time between the mobile station and the PPM is longer by about 1.0 sec in the satellite packet system at the maximum.

Here, the packet gateway relay processing device PGW
Has a response wait timer value for the wireless section, but the conventional PGW has a cellular packet system (for example,
Since it is tuned for use in a PDC-P network or the like, a response wait timer value for transmitting a signal to a mobile device and waiting for a response is adjusted for a cellular packet system. Therefore, in the satellite packet system, the response waiting timer may time out without waiting for a response to the signal transmitted from the PGW to the satellite mobile station. Therefore, the PGW needs to set a short time in the cellular packet system and a long time in the satellite packet system as the response wait timer value. Therefore, as shown in FIG. 2, in a system in which a cellular packet system and a satellite packet system coexist, there is a problem that it is necessary to provide a different configuration below the packet gateway relay processing device PGW.

In order to solve this problem, PG
W can have a uniformly large timer value in accordance with the delay time at the satellite. Adopting this method certainly reduces the possibility of timeout without waiting for a response from the satellite mobile station. However, on the contrary, there is a problem in that the time for timeout in the cellular mobile device is delayed, so that the state recovery due to the timeout is delayed.

In view of the above problems, an object of the present invention is to provide a PG
In W, the communication system (cellular / satellite) is distinguished and each timer value is provided, so that the packet gateway relay processing device P in the cellular packet system and the satellite packet system can be used.
An object of the present invention is to provide a packet communication system and a packet communication method that can commonly use a GW.

[0009]

According to the first aspect of the present invention, there is provided a subscriber processing apparatus for a cellular packet system,
In a packet communication system including a subscriber processing device for a satellite packet system and a gateway relay processing device for connecting each of the subscriber processing devices to another network, the gateway relay processing device is configured such that a packet communication partner is a cellular. Determining means for determining whether the processing unit is a subscriber processing unit for a packet system or a subscriber processing unit for a satellite packet system; and a setting unit for setting a response wait timer value for a wireless section according to the determination result of the determining unit. It is characterized by having.

According to a second aspect of the present invention, in the packet communication system according to the first aspect, the determining means determines based on a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device. It is characterized by doing.

According to a third aspect of the present invention, in the packet communication system according to the first aspect, the determining means confirms a communication start notification transmitted from the subscriber processing device to the gateway relay processing device. It is characterized by making a judgment based on a signal.

According to a fourth aspect of the present invention, in the packet communication system according to the first aspect, the setting means sets a short timer value to a subscriber processing unit for a cellular packet system, and sets the satellite timer to The present invention is characterized in that a long timer value is set for a subscriber processing device for a packet system.

According to a fifth aspect of the present invention, there is provided a gateway relay processing device for connecting a subscriber processing device for a cellular packet system and a subscriber processing device for a satellite packet system to another network. And a setting means for setting a response waiting timer value for a wireless section in accordance with a result of the judgment by the judgment means for determining whether the processing is a subscriber processing device for a cellular packet system or a subscriber processing device for a satellite packet system. And characterized in that:

According to a sixth aspect of the present invention, in the gateway relay processing device according to the fifth aspect, the determination means is configured to receive a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device. It is characterized by making a judgment.

According to a seventh aspect of the present invention, in the gateway relay processing apparatus according to the fifth aspect, the determination means is transmitted from the subscriber processing apparatus to the gateway relay processing apparatus.
The determination is made based on a confirmation signal for the communication start notification.

According to an eighth aspect of the present invention, in the gateway relay processing apparatus according to the fifth aspect, the setting means sets a short timer value to a subscriber processing apparatus for a cellular packet system, and The present invention is characterized in that a long timer value is set for a subscriber processing device for a satellite packet system.

According to a ninth aspect of the present invention, there is provided a gateway for connecting a subscriber processing unit for a cellular packet system, a subscriber processing unit for a satellite packet system, and another network. A packet communication method using the relay processing device, a determining step of determining whether the other party that performs packet communication with the gateway relay processing device is a subscriber processing device for a cellular packet system or a subscriber processing device for a satellite packet system; Setting a response waiting timer value for a wireless section according to the result of the determination.

According to a tenth aspect of the present invention, in the packet communication method according to the ninth aspect, the determining step includes:
The determination is made based on a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device.

[0019] According to an eleventh aspect of the present invention, in the packet communication method according to the ninth aspect, the determining step includes:
The determination is made based on a confirmation signal for the communication start notification transmitted from the subscriber processing device to the gateway relay processing device.

According to a twelfth aspect of the present invention, in the packet communication method according to the ninth aspect, the setting step comprises:
It is characterized in that a short timer value is set for a subscriber processing device for a cellular packet system and a long timer value is set for a subscriber processing device for a satellite packet system.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 3 is a diagram showing an example of a system configuration in which a cellular packet system and a satellite packet system to which the present invention is applied coexist.

The present system comprises at least a packet gateway relay processor PGW12, a cellular packet subscriber processor PPM20, a cellular base station 30, a cellular mobile station 40, and a satellite packet subscriber processor PPM.
21, a satellite base station 31, a satellite mobile unit 41, and a satellite 60. Packet gateway relay processor P
The GW 12 is a network service provider NSP /
Intranet 50, cellular packet processing unit PPM20, and satellite packet processing unit P
An exchange connected to the PM 21 and having a gateway function for connecting a cellular packet network or a satellite packet network to another network such as the network service provider NSP / intranet 50. Cellular packet subscriber processing unit PPM20
Is located between the packet gateway relay processing device PGW12 and the cellular base station 30, and has a function of performing packet exchange. The cellular base station 30 has a function of transmitting and receiving a wireless packet to and from the cellular mobile station 40 located in the area. The satellite packet subscriber processor PPM21 is located between the packet gateway relay processor PGW12 and the satellite base station 31, and has a function of performing packet switching. The satellite base station 31 has a function of transmitting and receiving wireless packets via the satellite 60 to and from the cellular mobile device 40 located in the area. Satellite 60
Is a communication satellite such as NSTAR.

Here, as described above, since the delay time in the radio section differs between the cellular packet system and the satellite packet system, the packet gateway relay processing device PGW1
2 is a cellular packet subscriber processing unit PPM.
Communication with satellite or satellite packet subscriber processing unit PPM
21 is determined. By setting a short time in the cellular packet system and a long time in the satellite packet system for the response wait timer value for the radio section provided in the packet gateway relay processing device PGW12, the packet gateway relay processing device in both systems is set. The PGW 12 is shared.

FIG. 4 is a diagram showing an example of the hardware configuration of the packet subscriber processing unit PPM to which the present invention is applied. Only the parts related to the present invention in the configuration of the packet subscriber processing unit PPM are shown. Is conceptually shown.

Packet subscriber processing unit PPM400
Is a line correspondence unit 401 corresponding to at least each line to a base station or the like, and a connection unit 40 having the function of a switching hub.
2, and a control unit 403 that controls the entire system.

The line corresponding unit 401 includes a packet highway switching device HWSW404, a packet line processing device PLU
406 and MLS connection interface circuit MLEIF
408. Packet highway switching device HW
SW404 is a packet line processing unit PLU406, M
Connected to the LS connection interface circuit MLEIF 408 and the line switching device CSW 416, for example, 2 Mbits.
/ S highway interface or other interface. The packet line processing unit PLU 406 includes a packet highway switching unit HWS.
W404 and the connection unit 402 are connected to the base station and the LA.
This is a terminal device that performs communication using the PB protocol, and has a function of transmitting and receiving a call processing signal for packet communication and a signal of a monitoring system to a base station. The MLS connection interface circuit MLEIF 408 is connected to the packet highway switching device HWSW 404 and the line switching device CSW 416 and has a function of connecting to another switching device such as a voice switching device MLS, for example, and transmits and receives broadcast information for packet communication In this case, information on the channel for packet communication is received from the base station, the information is transmitted to the voice exchange MLS as broadcast information, and the broadcast information is transmitted from the base station to the mobile station via the voice exchange MLS. .

The connection section 402 is connected to the line correspondence section 401 and the control section 403, and has a function of a switching hub.

The control unit 403 includes a router RT 412, a PP
M central processing unit PCP414, line switching unit CSW41
6 and a file unit FILU 418. The router RT412 is connected to the PPM central processing unit PCP4.
14 and another packet processing unit PPM
Alternatively, it has a router function when connecting to a packet gateway relay processing device. The PPM central processing unit PCP414 includes a connection unit 402, a router RT412, and a line switching device CSW4.
16 and a file unit FILU 418, and has a function of controlling the entire system by a stored program. The line switching device CSW 416 includes a packet highway switching device HWSW 404, an MLS connection interface circuit MLEIF 408, a PPM central processing unit PCP
414 and the line corresponding unit 401, each of which is a duplicated packet highway switching device HWSW40.
4. The function of performing system switching when a failure occurs in one system of the MLS connection interface circuit MLEIF 408 and the PPM central processing unit PCP414, and the function of the active main system
It has a function of connecting the connection from the line corresponding unit 401 to the PM central processing unit PCP414. File unit FI
The LU 418 is connected to the PPM central processing unit PCP 414 and has a function of storing a control program, station data such as a setting file of the exchange, and the like.

FIG. 5 is a diagram showing an example of the hardware configuration of the packet gateway relay processing device PGW to which the present invention is applied. Only the part related to the present invention in the configuration of the packet gateway relay processing device PGW is conceptually shown. Is shown.

Packet gateway relay processing unit PGW500
Is a control unit 502 for controlling at least the entire control;
Gateway connection part 5 having connection function to P / intranet
04.

The control unit 502 includes a router RT 506 and a P
GW central processing unit GCP508 and file unit F
ILU 510. The router RT506 has a P
It is connected to the GW central processing unit GCP508, and is connected to another packet-subscriber-based processing device PPM or a packet-subscriber-based processing device PPM, or a packet subscriber communication information collection system C
It has a router function when connecting to CC_P. The PGW central processing unit GCP 508 is connected to the gateway connection unit 504, the router RT 506, and the file unit FILU 510, and has a function of controlling the entire system. The file unit FILU 510 is a PGW central processing unit GCP50.
8 and has a function of storing a control program and station data such as a setting file of the exchange.

The gateway connection unit 504 is connected to the control unit 502 and has functions such as a switching hub and a router when connecting to the NSP / intranet.

FIG. 8 is a functional block diagram of the packet gateway relay processing device PGW shown in FIG. 5, and conceptually shows only those parts of the function of the packet gateway relay processing device PGW related to the present invention. Each of the functional blocks described in FIG. 8 corresponds to the packet barrier relay processing device P described in FIG.
The hardware configuration of the GW 500 is realized by a program or the like executed in the PGW central processing unit GCP508 in the drawing.

Packet gateway relay processing unit PGW800
Is composed of at least a communication partner determination unit 802 and a timer value setting unit 804.

The communication partner determination unit 802 has a function of determining whether a packet communication partner is a PPM for a cellular packet system or a PPM for a satellite packet system.

The timer value setting unit 804 has a function of setting a response waiting timer value for a wireless section according to the result of the judgment made by the communication partner judgment unit 802.

Next, an example of the operation of the packet communication system in the case where the mobile station transmits and receives packets in the present embodiment configured as described above will be described in detail with reference to FIGS. 6 and 7. I do. Here, the communication sequence described below uses a technique conventionally implemented in cellular packet communication (19).
1998 NTT DoCoMo Technical Journal, Vol. 6 No. 3 See pages 30 to 34).

FIG. 6 is a diagram showing an example of a communication sequence when a mobile station transmits a packet.

In the process of transmitting a packet, the first time that the PGW activates the timer and transmits a signal to the mobile station is the timer used at the time of PPP negotiation. Therefore, in the PGW, it is necessary to distinguish between a satellite and a cellular communication system before entering the stage of PPP negotiation. In a sequence at the time of transmitting a packet, which will be described in detail below, the PP is transmitted immediately before the PPP negotiation.
A line connection request signal is transmitted from M to the PGW. In the present invention, a "communication method" parameter is newly defined in the line connection request, and the communication method in the line connection request from the cellular PPM is "cellular" and the communication method in the line connection request from the satellite PPM is " The value indicating "satellite" is set in the "communication method" parameter. And PGW
Then, a line connection request from the PPM is received, and if the “communication method” parameter in the request is “cellular”, the timer value at the time of PPP negotiation is set for cellular. If the communication method parameter is “satellite”, The timer value for the satellite will be set.

First, the mobile station makes a packet communication registration request to the PPM (step S602).

Next, authentication processing is performed between the mobile station and the PPM (step S604).

Next, a packet communication registration response is transmitted from the PPM to the mobile station (step S606).

Next, the mobile station issues a virtual circuit connection request to the PPM (step S608).

Next, the PPM issues a line connection request to the PGW (step S610). In the packet of the line connection request, there is a “communication method” parameter for distinguishing whether the source PPM is a satellite PPM or a cellular PPM,
The PGW determines whether the transmission source is the satellite PPM or the cellular PPM by referring to the “communication method” parameter.

Next, the PGW transmits a line connection response to the PPM (step S612).

Next, the PPM transmits a virtual circuit connection response to the mobile device (step S614).

Next, negotiation (PPP negotiation) by the point-to-point protocol PPP is performed between the mobile station, the PPM, and the PGW (step S616). In PPP negotiation,
The PGW sets a satellite timer time when the communication partner is a satellite PPM, and sets a cellular timer time when the communication partner is a cellular PPM.

FIG. 7 is a diagram showing an example of a communication sequence when a mobile station receives a packet.

When a packet arrives from the NSP / intranet, the PGW transmits a communication start notification signal to the PPM,
After the PPM and the mobile device perform the incoming call processing, a line connection request is finally transmitted to the PGW. In this process, PG
W starts a timer when transmitting a communication start notification, and waits until a line connection request is received. The timer value of the line connection request waiting timer activated at the time of transmitting the communication start notification needs to be set separately for the cellular and the satellite. However, since there is no signal transmitted from the PPM to the PGW at the time of the communication start notification, it is not possible to judge whether the communication system is cellular or satellite. In this case, only the satellite PPM sends a confirmation signal to the PGW for the communication start notification. Send, PGW
Determines the communication method based on the presence or absence of the signal.

First, when a packet addressed to a mobile device arrives at the PGW, the PGW sets a line connection request waiting timer to a cellular timer time (step S702).

Next, the PGW transmits a communication start notification to the PPM (step S704).

Next, the PPM calls the mobile station (step S706).

Next, when the satellite PPM is the calling source of the mobile station, the satellite PPM transmits a communication start response instruction to the PGW (step S708). PGW,
Upon receiving the communication start response instruction, it recognizes that the packet transmission destination is the satellite PPM, and adjusts the timer time set in step S702 to be the satellite timer time. That is, the difference time between the satellite timer time and the cellular timer time is added to the current timer time (step S716).

Next, when a packet communication registration request is transmitted from the mobile station (step S710), authentication processing is executed between the PPM and the mobile station (step S712).

Next, the PPM issues a line connection request to the PGW (step S714). Here, if the PGW does not receive the communication start response instruction in step S708 and receives the line connection request in step S714, it is known that the connection destination of the PGW is the cellular PPM, so the timer time in step S716 Is not updated.

Next, the PGW transmits a line connection response to the PPM (step S718).

Next, the PPM transmits a packet communication registration response to the mobile station (step S720).

Next, the PPM issues a virtual circuit connection request to the mobile device (step S722).

Next, the mobile station transmits a virtual circuit connection response to the PPM (step S724).

Next, negotiation (PPP negotiation) by the point-to-point protocol PPP is performed between the mobile station, the PPM, and the PGW (step S726). In PPP negotiation,
The PGW uses the satellite timer time set in step S716 if the communication partner is a satellite PPM, and uses the cellular timer time set in step S702 if it is a cellular PPM.

(Other Embodiments) In the above-described embodiment, an example has been described in which the base station, the packet subscriber processing unit, and the packet gateway relay processing unit are realized as independent housings. The present invention is not limited to this case. In other embodiments, the base station, the packet subscriber processing device, and the packet gateway relay processing device may be appropriately combined and implemented as one housing. What can be done is obvious to a person skilled in the art.

[0063]

As described above in detail, according to the present invention, the gateway relay processing device is configured such that a packet communication partner is a subscriber processing device for a cellular packet system or a subscriber processing device for a satellite packet system. A communication unit (cellular / satellite) in the PGW, and a timer value for each of the timer values. , The packet gateway relay processing device PGW can be commonly used in the cellular packet system and the satellite packet system.

Further, according to the present invention, the judging means comprises a “line connection request signal” transmitted from the subscriber processing device to the gateway relay processing device, or a signal transmitted from the subscriber processing device to the gateway relay processing device. Since the determination is made based on the “confirmation signal for the communication start notification” transmitted to the communication partner, it is possible to efficiently determine the communication partner while minimizing the change to the conventional communication sequence.

Further, according to the present invention, the setting means sets a short timer value for the subscriber processing device for the cellular packet system and sets a long timer value for the subscriber processing device for the satellite packet system. Since the timer value is set,
While setting an appropriate timer value in the cellular packet system and the satellite packet system, the packet gateway relay processing device P
GW can be used in common.

[0066]

[Brief description of the drawings]

FIG. 1 is a diagram conceptually illustrating an example of a cellular packet system according to the related art.

FIG. 2 is a diagram conceptually illustrating an example of a system in which a cellular packet system and a satellite packet system according to the related art coexist.

FIG. 3 is a diagram showing an example of a system configuration in which a cellular packet system and a satellite packet system to which the present invention is applied coexist.

FIG. 4 is a diagram illustrating an example of a hardware configuration of a packet subscriber processing device PPM to which the present invention is applied;

FIG. 5 is a diagram showing an example of a hardware configuration of a packet subscriber processing device PPM to which the present invention is applied.

FIG. 6 is a diagram illustrating an example of a communication sequence when a mobile device transmits a packet.

FIG. 7 is a diagram illustrating an example of a communication sequence when a mobile device receives a packet.

8 is a functional block diagram of the packet gateway relay processing device PGW shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Cellular packet gateway relay processor PGW 11 Satellite packet gateway relay processor PGW 12 Packet gateway relay processor PGW 20 Cellular packet subscriber processor PPM 21 Satellite packet subscriber processor PPM 30 Cellular base station Reference Signs List 31 base station for satellite 40 mobile unit for cellular phone 41 mobile unit for satellite 50 network service provider NSP / intranet 60 satellite 100 packet communication system 400 packet subscriber processing unit PPM 401 line corresponding unit 402 connection unit 403 control unit 404 packet highway switching Device HWSW 406 Packet line processor PLU 408 MLS connection interface circuit MLEIF 410 Line switching device CSW 412 Router RT 414 PPM central processing unit PCP 416 Line switching device SW 418 file unit FILU 500 packet gateway relay processing unit PGW 502 controller 504 gateway connecting portion 506 router RT 508 PGW CPU GCP 510 File Unit FILU 800 packet gateway relay processing unit PGW 802 communication partner determination unit 804 timer value setting portion

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04L 12/56 H04L 11/20 102A 29/08 13/00 307A (72) Inventor Hiroshi Kubozawa Tokyo Metropolitan Port 2-10-1, Toranomon-ku, NTT Mobile Communication Network Co., Ltd. (72) Keiko Yoshihara, Inventor F-term, NTT Mobile Communication Network Co., Ltd. 2-1-1 Toranomon, Minato-ku, Tokyo (Ref.) FF27

Claims (12)

[Claims] 1. A packet including a subscriber processor for a cellular packet system, a subscriber processor for a satellite packet system, and a gateway relay processor for connecting each subscriber processor to another network. In the communication system, the gateway relay processing device includes: a determination unit configured to determine whether a party to perform packet communication is a subscriber processing unit for a cellular packet system or a subscriber processing unit for a satellite packet system; Setting means for setting a response waiting timer value for a wireless section according to a result of the determination. 2. The packet communication system according to claim 1, wherein said determining means makes a determination based on a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device. Communications system. 3. The packet communication system according to claim 1, wherein the determination unit determines based on a confirmation signal for a communication start notification transmitted from the subscriber processing device to the gateway relay processing device. Packet communication system. 4. The packet communication system according to claim 1, wherein said setting means sets a short timer value for a subscriber processing unit for a cellular packet system, and sets a subscriber system for a satellite packet system. A packet communication system for setting a long timer value for a processing device. 5. A gateway relay processing device for connecting a subscriber packet processing device for a cellular packet system and a subscriber packet processing device for a satellite packet system to another network, wherein a communication partner of the packet is a subscriber for the cellular packet system. And a setting unit for setting a response wait timer value for a wireless section in accordance with the result of the judgment by the judgment unit. A gateway relay processing device. 6. The gateway relay processing device according to claim 5, wherein the determination unit makes a determination based on a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device. Gateway relay processing unit. 7. The gateway relay processing device according to claim 5, wherein the determination unit determines based on a confirmation signal for a communication start notification transmitted from the subscriber processing device to the gateway relay processing device. Characteristic gateway relay processing device. 8. The gateway relay processing device according to claim 5, wherein the setting unit sets a short timer value to a subscriber processing device for a cellular packet system, and sets a subscriber for a satellite packet system. A gateway relay processing device, wherein a long timer value is set for a system processing device. 9. A packet using a subscriber processing device for a cellular packet system, a subscriber processing device for a satellite packet system, and a gateway relay processing device for connecting each of the subscriber processing devices to another network. In the communication method, a decision step of deciding whether a party communicating with the gateway relay processing apparatus for packet communication is a subscriber processing apparatus for a cellular packet system or a subscriber processing apparatus for a satellite packet system, and a decision result of the decision step A setting step of setting a response waiting timer value for a wireless section according to the following. 10. The packet communication method according to claim 9, wherein the determining step is performed based on a line connection request signal transmitted from the subscriber processing device to the gateway relay processing device. Communication method. 11. The packet communication method according to claim 9, wherein the determining step is performed by a confirmation signal for a communication start notification transmitted from the subscriber processing device to the gateway relay processing device. Packet communication method. 12. The packet communication method according to claim 9, wherein said setting step sets a short timer value for a subscriber processing device for a cellular packet system, and sets a subscriber system for a satellite packet system. A packet communication method characterized by setting a long timer value for a processing device.